DATAJDBC-641 - Removes references of org.jetbrains.annotations.NotNull.

Those annotations cause build failures once the providing jar wasn't available anymore since kotlin removed that dependency.

Those annotations were present in the code by accident anyway since Spring has and uses its own set of annotations.

Author: schauder

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateChangeExecutorContextImmutableUnitTests.java

@@ -25,7 +25,6 @@
 
 import java.util.List;
 
-import org.jetbrains.annotations.NotNull;
 import org.junit.Test;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Version;
@@ -134,12 +133,10 @@ PersistentPropertyPathExtension toPathExt(String path) {
 		return new PersistentPropertyPathExtension(context, getPersistentPropertyPath(path));
 	}
 
-	@NotNull
 	PersistentPropertyPath<RelationalPersistentProperty> getPersistentPropertyPath(String propertyName) {
 		return context.getPersistentPropertyPath(propertyName, DummyEntity.class);
 	}
 
-	@NotNull
 	Identifier createBackRef() {
 		return JdbcIdentifierBuilder.forBackReferences(converter, toPathExt("content"), 23L).build();
 	}

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateChangeExecutorContextUnitTests.java

@@ -22,7 +22,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.jetbrains.annotations.NotNull;
 import org.junit.Test;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Version;
@@ -148,12 +147,10 @@ PersistentPropertyPathExtension toPathExt(String path) {
 		return new PersistentPropertyPathExtension(context, getPersistentPropertyPath(path));
 	}
 
-	@NotNull
 	PersistentPropertyPath<RelationalPersistentProperty> getPersistentPropertyPath(String propertyName) {
 		return context.getPersistentPropertyPath(propertyName, DummyEntity.class);
 	}
 
-	@NotNull
 	Identifier createBackRef() {
 		return JdbcIdentifierBuilder.forBackReferences(converter, toPathExt("content"), 23L).build();
 	}

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/mapping/PersistentPropertyPathTestUtils.java

@@ -17,7 +17,6 @@
 
 import lombok.experimental.UtilityClass;
 
-import org.jetbrains.annotations.NotNull;
 import org.springframework.data.mapping.PersistentPropertyPath;
 import org.springframework.data.relational.core.mapping.RelationalMappingContext;
 import org.springframework.data.relational.core.mapping.RelationalPersistentProperty;
@@ -28,7 +27,6 @@
 @UtilityClass
 public class PersistentPropertyPathTestUtils {
 
-	@NotNull
 	public static PersistentPropertyPath<RelationalPersistentProperty> getPath(RelationalMappingContext context,
 			String path, Class<?> baseType) {
 

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/config/EnableJdbcAuditingHsqlIntegrationTests.java

@@ -26,7 +26,6 @@
 import java.util.function.Consumer;
 
 import org.assertj.core.api.SoftAssertions;
-import org.jetbrains.annotations.NotNull;
 import org.junit.Test;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -271,7 +270,7 @@ NamingStrategy namingStrategy() {
 
 			return new NamingStrategy() {
 
-				public String getTableName(@NotNull Class<?> type) {
+				public String getTableName(Class<?> type) {
 					return "DummyEntity";
 				}
 			};

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/query/JdbcQueryMethodUnitTests.java

@@ -23,7 +23,6 @@
 import java.sql.ResultSet;
 import java.util.Properties;
 
-import org.jetbrains.annotations.NotNull;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -98,7 +97,6 @@ public void returnsSpecifiedSqlStatementIfNameAndValueAreGiven() throws NoSuchMe
 
 	}
 
-	@NotNull
 	private JdbcQueryMethod createJdbcQueryMethod(String methodName) throws NoSuchMethodException {
 
 		Method method = JdbcQueryMethodUnitTests.class.getDeclaredMethod(methodName);